Zobrazeno 1 - 10
of 271
pro vyhledávání: '"Guy C. Lloyd-Jones"'
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)
Abstract Since its discovery in mid-20th century, the sensitivity of Nuclear Magnetic Resonance (NMR) has increased steadily, in part due to the design of new, sophisticated NMR experiments. Here we report on a liquid-state NMR methodology that signi
Externí odkaz:
https://doaj.org/article/068c55c04b3843cdbcb7e533a213e8b5
Autor:
Yael Ben-Tal, Patrick J. Boaler, Harvey J.A. Dale, Ruth E. Dooley, Nicole A. Fohn, Yuan Gao, Andrés García-Domínguez, Katie M. Grant, Andrew M.R. Hall, Hannah L.D. Hayes, Maciej M. Kucharski, Ran Wei, Guy C. Lloyd-Jones
Publikováno v:
Ben-tal, Y, Boaler, P J, J. A. Dale, H, Fohn, N A, Gao, Y, García-domínguez, A, Grant, K M, M. R. Hall, A, Hayes, H L D, Kucharski, M M, Wei, R & Lloyd-jones, G C 2022, ' Mechanistic Analysis by NMR Spectroscopy: a Users Guide ', Progress in nuclear magnetic resonance spectroscopy . https://doi.org/10.1016/j.pnmrs.2022.01.001
A ‘principles and practice’ tutorial-style review of the application of solution-phase NMR in the analysis of the mechanisms of homogeneous organic and organometallic reactions and processes. This review of 345 references summarises why solution-
Autor:
Yael, Ben-Tal, Guy C, Lloyd-Jones
Publikováno v:
Journal of the American Chemical Society. 144(33)
The Ni/Ir-photocatalyzed coupling of an aryl bromide (ArBr) with an alkyl bromide (RBr) has been analyzed using
Publikováno v:
Wei, R, Dickson, C L, Uhrin, D & Lloyd-jones, G C 2021, ' Rapid Estimation of T 1 for Quantitative NMR ', Journal of Organic Chemistry, vol. 86, no. 13, pp. 9023–9029 . https://doi.org/10.1021/acs.joc.1c01007
Quantitative NMR spectroscopy (qNMR) is an essential tool in organic chemistry, with applications including reaction monitoring, mechanistic analysis, and purity determination. Establishing the correct acquisition rate for consecutive qNMR scans requ
Autor:
Andrew M. R. Hall, Ran Wei, Mark S. Pritchard, Richard Behrens, Guy C. Lloyd-Jones, Edward J. King
Publikováno v:
European Journal of Organic Chemistry
Wei, R, Hall, A M R, Behrens, R, Pritchard, M S, King, E J & Lloyd-Jones, G C 2021, ' Stopped-Flow 19F NMR Spectroscopic Analysis of a Protodeboronation Proceeding at the Sub-Second Time-Scale ', European Journal of Organic Chemistry, vol. 2021, no. 17, pp. 2331-2342 . https://doi.org/10.1002/ejoc.202100290
Wei, R, Hall, A M R, Behrens, R, Pritchard, M S, King, E J & Lloyd-Jones, G C 2021, ' Stopped-Flow 19F NMR Spectroscopic Analysis of a Protodeboronation Proceeding at the Sub-Second Time-Scale ', European Journal of Organic Chemistry, vol. 2021, no. 17, pp. 2331-2342 . https://doi.org/10.1002/ejoc.202100290
In-situ NMR spectroscopic analysis of homogeneous reactions is an essential tool for mechanistic analysis in organic and organometallic chemistry. However, rapid non-equilibrium reactions, that are initiated by mixing, require specialized approaches.
Autor:
Andrés García-Domínguez, Guy C. Lloyd-Jones, Gilian T. Thomas, Arnau R. Sugranyes, Pedro H. Helou de Oliveira
Publikováno v:
ACS Catalysis
García-domínguez, A, Helou De Oliveira, P H, Thomas, G T, Sugranyes, A R & Lloyd-jones, G C 2021, ' Mechanism of Anion-Catalyzed C–H Silylation Using TMSCF 3 : Kinetically-Controlled CF 3-Anionoid Partitioning As a Key Parameter ', ACS Catalysis, vol. 11, no. 5, pp. 3017-3025 . https://doi.org/10.1021/acscatal.1c00033
García-domínguez, A, Helou De Oliveira, P H, Thomas, G T, Sugranyes, A R & Lloyd-jones, G C 2021, ' Mechanism of Anion-Catalyzed C–H Silylation Using TMSCF 3 : Kinetically-Controlled CF 3-Anionoid Partitioning As a Key Parameter ', ACS Catalysis, vol. 11, no. 5, pp. 3017-3025 . https://doi.org/10.1021/acscatal.1c00033
The mechanism of anion-catalyzed C–H silylation by R3SiCF3 reagents has been investigated using homogeneous TBAT-initiation, in situ and stopped-flow 19F NMR spectroscopy 2H-KIE, LFER, deuterium-labeled crossover, structure-selectivity quantitation
Autor:
Charles L. Perrin, Israel Agranat, Alessandro Bagno, Silvia E. Braslavsky, Pedro Alexandrino Fernandes, Jean-François Gal, Guy C. Lloyd-Jones, Herbert Mayr, Joseph R. Murdoch, Norma Sbarbati Nudelman, Leo Radom, Zvi Rappoport, Marie-Françoise Ruasse, Hans-Ullrich Siehl, Yoshito Takeuchi, Thomas T. Tidwell, Einar Uggerud, Ian H. Williams
Publikováno v:
Pure and Applied Chemistry, vol 94, iss 4
Perrin, C L, Agranat, I, Bagno, A, Braslavsky, S E, Fernandes, P A, Gal, J, Lloyd-jones, G C, Mayr, H, Murdoch, J R, Nudelman, N S, Radom, L, Rappoport, Z, Ruasse, M, Siehl, H, Takeuchi, Y, Tidwell, T T, Uggerud, E & Williams, I H 2022, ' Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021) ', Pure and applied chemistry, vol. 94, no. 4, pp. 353-534 . https://doi.org/10.1515/pac-2018-1010
Perrin, C L, Agranat, I, Bagno, A, Braslavsky, S E, Fernandes, P A, Gal, J, Lloyd-jones, G C, Mayr, H, Murdoch, J R, Nudelman, N S, Radom, L, Rappoport, Z, Ruasse, M, Siehl, H, Takeuchi, Y, Tidwell, T T, Uggerud, E & Williams, I H 2022, ' Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021) ', Pure and applied chemistry, vol. 94, no. 4, pp. 353-534 . https://doi.org/10.1515/pac-2018-1010
This Glossary contains definitions, explanatory notes, and sources for terms used in physical organic chemistry. Its aim is to provide guidance on the terminology of physical organic chemistry, with a view to achieving a consensus on the meaning and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca66ccc111e35a67246f5b9ec5ba0e8e
https://escholarship.org/uc/item/2rx9m9pg
https://escholarship.org/uc/item/2rx9m9pg
Autor:
Stephen Sproules, Megan Greaves, David J. Nelson, Guy C. Lloyd-Jones, Feliu Maseras, Thomas O. Ronson
Publikováno v:
Greaves, M E, Ronson, T O, Lloyd-jones, G C, Maseras, F, Sproules, S & Nelson, D J 2020, ' Unexpected Nickel Complex Speciation Unlocks Alternative Pathways for the Reactions of Alkyl Halides with dppf-Nickel(0) ', ACS Catalysis, vol. 10, no. 18, pp. 10717-10725 . https://doi.org/10.1021/acscatal.0c02514
ACS Catalysis
ACS Catalysis
The mechanism of the reactions between dppf-Ni0 complexes and alkyl halides has been investigated using kinetic and mechanistic experiments and DFT calculations. The active species is [Ni(κ2-dppf)(κ1-dppf)], which undergoes a halide abstraction rea
Publikováno v:
ACS Catalysis. 10:10420-10426
Domino catalysis is a well-explored route to increasing the efficiency of multistep reactions. However, the kinetic features required for efficient turnover of a process where “multiple transformat...
Autor:
James J. Race, Timothy M. Boyd, Kori A. Andrea, David E. Ryan, Andrew S. Weller, Guy C. Lloyd-Jones
Publikováno v:
Ryan, D E, Andrea, K A, Race, J J, Boyd, T M, Lloyd-jones, G C & Weller, A S 2020, ' Amine–Borane Dehydropolymerization Using Rh-Based Precatalysts: Resting State, Chain Control, and Efficient Polymer Synthesis ', ACS Catalysis, pp. 7443-7448 . https://doi.org/10.1021/acscatal.0c02211
A detailed study of H3B·NMeH2 dehydropolymerization using the cationic precatalyst [Rh(DPEphos)(H2BNMe3(CH2)2tBu)][BArF4] identifies the resting state as dimeric [Rh(DPEphos)H2]2 and boronium [H2B(NMeH2)2]+ as the chain-control agent. [Rh(DPEphos)H2